Here is the full list of all 55 The Assistant Season 1 achievements.
Meet Pamela
Meet Sarah
Meet Susan
Meet Iris
Meet Grace
Meet Lisa
Start Sarah's bad route
Start Sarah's good route
Take a peek at Sarah on day 2
Help Sarah with Mrs. Bancroft
Start Susan's route 1
Start Susan's route 2
Meet Elaine and Clarice
Meet Beatriz
Take a look at Susan's phone
Volunteer for Susan's experiment
Meet Roxy
Be kind with Roxy
Meet Gwendolyn
Check if Beatriz is Ok on the night of day 5
Leave Beatriz's room on the night of day 5
Accept Pamela's proposal unconditionally (Pamela's route 1)
Demand conditions from Pamela to accept the proposal (Pamela's route 2)
Reject Pamela's proposal (Pamela's route 3)
Meet Olivia
Accept Olivia's proposal
Be direct wiht Lisa on day 6
Ask Lisa on day 6 if she liked what she saw
Meet Eve
Meet Zoe
Reject Zoe on day 6
Check if Beatriz is Ok on day 6
Play along with Mrs. Bancroft on day 7
Meet Piper
Reject Sarah on day 7 (Sarah's route 3)
Kiss Sarah on day 7
Recriminate Christian on day 7
Ask Christian if he's okay on day 7
Help Christian
Enter the confessional on day 7 (Clarice's route 1)
Don't enter the confessional on day 7 (Clarice's route 2)
Meet Sophia
Meet Mel
Pretend to be asleep on day 7
Invite Lisa on day 8
Go to Elaine's kitchen on day 8
Listen to Harry's story on day 8
Let Susan record on day 8
Be understanding with Beatriz on day 8
Don't be understanding with Beatriz on day 8
Meet Sasha
Help Sasha
Reject Iris on day 9
Do it with Iris at the disco
Do it with Iris at her home